I suck at taking pics.

But I did build this awesome K'nex gun, really just a glorified slingshot with a mechanical release. It kicks ass. Ammo are sharpened grey rods with a metal tip inserted and fins (which are necessary to stabilize the damn things, already had one fly back and hit me in the side of the head, not cool at all)

http://img199.imageshack.us/img199/4627/1000007w.jpg